Cooling means for engines and other devices



G. C. MARSH. COOLING MEANS FOR ENGINES AND OTHER DEVICES.

APPLICATION FILED .IAN.27 I917.

Patented Feb. 10

2 SHEETS-SHEET I G. C. MARSH..

COOLING MEANS FOR ENGINES AND OTHER DEVICES.

APPLICATION FILED JAN. 27. I917.

Patented Feb. 10,1920.

2 SHEETS-SHEET 2.

STATES PATENT OFFICE."

ennrr exam, or srl coonme mnans non Application med January 27,

To all whom it may concern:

Be it known that 1, GRANT G. MARSH, a :itizen of the United States, residing at St. Louis, Missouri, have invented a certainnew and useful Improvement in Cooling Means for Engines and other Devices, of which the following is a full, clear, and exact description, such as will enable others skilled in the artto which it appertains to make and use the same.

This invention relates to a means for cooling engines and various other kinds of machines and structures that are provided with cylinders or' other parts which it is necessar or desirableto cool.

One, ject of my inventi 'n is to provide an efficient cooling means for the purpose described that is less expensive to build, lighter in weight and ,easier to maintain in proper con 'tion than a cooling. system inwhich water or other liquid is used as the cooling medium.

Another-object'is to provide an air cooled engine'or machine that will be cooled as effectively as an engine provided with a water cooling stem, thereby overcoming the necessity 0 using high test cylinder oil, as is necessary with the air-cooled engines now in use. Other objects and desirable features of my invention will be hereinafter pointed out. I have herein illustrated my invention embodied in an internalcombustion engine of the type that is now generally" used in automobiles, but I wish my invention is not limited to use with internal combustion engines, but, on the contrary, can be used with various other kinds of machines and devices which comprise parts that require cooling.

Briefly stated, my broad idea consists in arranging a j acket or casing over or around the part that is to be cooled, so as to form an ainchamb'er, and then drawing air through said chamber by means of a suitable suction device, so as to absorb and carry away the heat that radiates from the part with which 7 construction of cooperates. The particular the jacket or element used to form the air chamber is immaterial, and it is also immaterial what means is employed for suckin or drawing air into and through said cham r.

Figure 1 of the drawings isa side elevational view of an internal combustion enthe air chamber LOUIS, MISSOURI, ASSIGNOB KOKEN, OF ST. LOUIS, MISSOURI.

- Specification of Iietters Patent.

' illustrates one that is combined with it to be understood that case the cylinders and certain chamber and causing through same,

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Patented Feb. 10, 1920.

1917. Serial no. 144,863.

gine constructed in accordance with my invention.

Fig. 2 is a said engine.

Fig. 3 is a similar view, illustrating a slight modification of m invention.

Fig. 4 is a detail vertlcal sectional view, illustrating-the construction of the airjacket used in the engine shown in Fig. 1.

ig. 5 is a similar view, illustrating another way of forming said air jacket.

front end elevational view of Figi'fi is a vertical sectional view, illusded with .an air shell that is case of the the cylintrating an engine prov1 jacket formed by a casing or mounted on the base or crank engine, so as to completely incase ders; and

Fig. 7 is a view, partly in and in vertical section, illustrating other form of my invention. v

Referring to Fig.1of the drawings, which form of my invention, designates the cylinders of an internal combustion engine, and B designates a jacket said cylinders, so as to form an air chamber a: into and through which air is drawn, so as to absorb and carry away the heat that radiates from the cylinders A. The jacket B of the engine shown in Fig. 1 is cast integral with the cylinders and is of substantially the same construction as the waterjacket of a water-cooled internal combustion engine. The particular construction of the jacket or casing that forms the air chamber m is immaterial, however, so far as my invention is concerned, and instead of being cast integral with the cylinders, as shown in Fig. 4, it canjconsist of a separate shell B that is arranged over the upper portions of the cylinders, as shown in Fig. 5, or a shell or casing B that is mounted. on the base or crank case of the engine, as shown in Fig. 6, so asto completely inparts of the valve mechanism. The air chamber w is provided with one or more air inlets, and means is provided for sucking air into said the air to circulate so as to absorb and carry away the heat that radiates from the cylinders of the engine. -Preferably, the jacket casing or part that forms the outer wall 0 the air chamber is provided with numerous still anholes, so that air will be drawn into the side elevation the form of used chamber m at a sufiicient number of points to obtain a constant supply of cool air to all portions of the chamber :0. If desired, short, open-ended tu'besl can be arranged in holes in the jacket B, as shown in Figs. 1 and 4, so as to tend to travel through numerous passageways of considerably greater length than their :rosssectional area in entering the air chamber in. The inner end of the tubes 1 can either be spaced away slightly from the cylinders, or they can be arranged in engagement with the cylinders and provided at their inner ends with notches 1, as shown in Fig. 4, through which the air escapes into the air chamber. The tubes 1 are not essential, however, as the air can be admitted directly to the air chamber wthrough holes 1 formed in the jacket, as shown in any other manner. either be constructed in such a manner that it forms an air chamber for all of the cylinders, or each cylinder can be provided with a separate jacket, in which event the various jackets will be connected with a manifold or manifolds, which, in turn, are connected with the suction device.

As previously stated, it is immaterial what means is usedfor drawing air into and through the air chamber or chambers. In my invention shown in Fig. 1, a rotary pump or fan G is used for this urpose, the inlet of the fan being connecte by an intake pipe 2 with the air chamber The intake pipe 2 is preferably provided with two branches or portions 2 that lead to the opposlte sides of the air chamber a9, so as t0 insure an adequate suppl of cooling anto all portions of the cylin ers of the engine. The suction ated in any suitable in Figs. 5 and 6, or The jacket B can into and through the air chamber or chambers, the carbureter C of the engine can be as the suction device of my improved coollng system. Therefore, in Fig. 3 of the drawlngs have illustrated another form of my invention, wherein the air intake pipe 2 leads to the air inlet of the carbureter C, which may be of any preferred type. When e carbureter of the engine is used as the suctlon device, the cost-of manufacturing the engine is, of course, reduced, and another advantage that results from u ing the carbureter as the suction device, is that the air admitted to the carbureter to vaporize the liquid fuel is preheated, thus overcoming the necessity of equipping the carbureter or the engine with a separate air heating means, as is now the usual practice.

In order that the engine may be maintionable feature tained at the temperature at which it operates most efiiciently, I have provided my improved coolin system with a means for varying or regulating the supply of a11' to the air chamber or chambers that cooperate with the part orparts to be cooled. In the form of my invention herein shown said means consists of valves 5 arranged in the two branches'of the air intake pipe 2 and controlled by rods or other devices 6 that preferably lead to a point in proximity to the operator in charge of the engine. It will, of-course, be understood that various other means can be used for controlling the to the system without departing from the spirit of my invention.

In most automobiles the exhaust pipe 7 of the engine extends underneath the floor boards of I the drivers compartment and heats said floor boards and compartment to such a degree in warm weather that it is very objectionable to the occupant. My improved cooling system enables this objecof automobiles to be remedied easily, by simply arranging a perforated jacket or casing 8 over, the portion of the exhaust pipe that extends under the floor boards, as shown in Fig. 1, and connecting the interior of said jacket by means of a pipe 9 with the air inlet pipe that leads to the suction device of the system. If desired, the pipe 9 may be provided with a valve 10 for controlling the supply of air that is drawn into and through the jacket 8. When a suction device, separate and distinct-from the carbureter, is used, the discharge side of said suction device can be connected by means of a pipe 11 with a foot warmer or other heating device (not shown) arranged at any desired oint inside of the automobile.

Air at normal temperature, when drawn into and through the air chamber a: in the manner described, will effectively cool the engine, but if desired, means may be used for cooling the air before it is admitted to said air chamber. One efiicient air cooling means that may be used consists of a member 12, formed of material that is more or less porous, and a receptacle 13 surrounding said member 12 and filled with water, as shown in Fig. 7; the member 12 being so constructed that air will be drawn through same when the suction device of tune system is in operation. In the form of my invention shown in Fig. 7 the member 12 has a center hole 12 that extends longitudinally through same, and said member mounted on an air inlet pipe 14 in one end of the receptacle 13, and an air pipe 14 that leads from the opposite end of said receptacle to a manifold 15. Branch pipes 16 lead from said manifold 15 to short .tubes 1 in the jacket 'A, so as to cause fresh air to be drawn into the member 12, cooled and also manufacturing moistened slightly, in traveling through said member, and thereafter supplied to the air chamber :10, so as to absorb and carry away the heat that radiates from the cylin ers. An air cooling. system of the character above described can be used successfully on internal combustion engines, steam engines, compressors and other kinds of machines for cooling the cylinders, and it can be used with various other kinds of devices for cooling parts which require cooling, such, for example, as with cannons and machine guns. \Vhen used on an automobile engine, it materially reduces the weight and cost of the automobile, as it overcomes the necessity of using a radiator. When combined with an internal com'bustion'engine it produces a more efiicient air cooled engine than any air cooled engine now in use, as it cools the cylinders so effectively that it is not necessary to use high test cylinder oil to lubricate the engine.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is:

1. An internal combustion engine provided with a cylinder, a jacket comb-med with said cylinder to form an air chamber, open-ended tubes carried by said jacket and arranged with their against the outside of the cylinder, said tubes being provided at their inner ends with notches, a. suction pump operated by the engine for drawing air into said chamber through said tubes and the notches at the inner ends of same said air out of said chamber after it has absorbed heatfrom the cylinder, an exhaust pipe, a perforated jacket arranged over a portion of said exhaust pipe, and a connection between said suction pump and said perforated jacket; for the purpose described.

'2. An internal combustion engine, comprising an air jacket combined with the cylinders, an air cooling means consisting of a porous member arranged in a water receptacle, said porous member having an air passageway in same which communicates with the atmosphere, and means for causing air to travel through the air passageway in said porous member and then circulate through said air jacket so as to absorb and carry away the heat that radiates from the cylinders.

4 GRANT C. MARSH.

inner ends butting and then drawing 

